Aran weight yarn, designated yarn weight symbol 4, is a medium-weight yarn often associated with textured knitting, including cables, sweaters, and traditional wool garments. Typically worked on needles ranging from US 8 to US 10 (5mm to 6mm), Aran weight creates a substantial fabric with wonderful stitch definition. In some places, especially North America, similar yarns may be called worsted weight yarn.

The Woolly Thistle’s Aran weight yarn collection features wool yarns chosen for their character, craftsmanship, and connection to traditional fiber stories. Discover breed-specific wool, heritage mills, and yarns that bring texture and depth to everything from classic cables to cozy accessories.